Dear Radio Experts,

This is a bit of a shot in the dark for me. I would like to fix the
old valve radio which has knocked around in my family for decades and I
left it in to the local electronics repair shop about 18 months ago.
Good news is they still have it. Bad news is that nothing has been
attempted to get it going again.

Some questions for you all:

Given its age at about 50 years what is most likely wrong (it last
worked in 1990)?
Where can you get repair parts?

In fairness to the repair guy, he did mention that replacement valves
are difficult to source but how difficult is difficult?
Thanks for any help.